Ok, none of this matters.
You're totally freaking out about a joke they got MILDLY turned around and it's a super cool look.
"Just wait until my friends get here"
To be clear:
most of America has shit geography because most Americans never go anywhere. (It's a big country, where most citizens don't need to leave to find work or make lives)
Most of Europe (including the UK) have a much better understanding of "the colonies" because it was a huge part of their history for longer than America was a country.
I lived in Surrey from age 5-18 so I think I have a passing, but shallow view of the situation.
Edit if you actually think Britain and Nicaragua have no colonial relationship, maybe learn your geography lol
https://en.m.wikipedia.org/wiki/English_settlement_in_Nicaragua